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          <h1 class="post-title" itemprop="name headline">前端面试题目css合集</h1>
        

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        <h3 id="1-css-reset的作用和用途"><a href="#1-css-reset的作用和用途" class="headerlink" title="1. css reset的作用和用途"></a>1. css reset的作用和用途</h3><p><strong>原因</strong>:各个浏览器默认样式差别太大 作用:初始化浏览器默认样式;</p>
<h3 id="2-css为什么要清除浮动，如何清除浮动及几种方法之间的差异"><a href="#2-css为什么要清除浮动，如何清除浮动及几种方法之间的差异" class="headerlink" title="2. css为什么要清除浮动，如何清除浮动及几种方法之间的差异"></a>2. css为什么要清除浮动，如何清除浮动及几种方法之间的差异</h3><p><strong>原因</strong>:<br>    1.浮动元素超出了父级元素的宽高;<br>    2.影响了父级兄弟元素的布局;<br><strong>方法</strong>:<br>    1.设置浮动元素的兄弟元素的clear：both;<br>    2.在父级元素末尾添加一个<strong>块级元素</strong>，并设置其clear:both;<br>    3.利用父级元素的::after伪类,其原理和方法3类似；需注意的是伪类元素需为<strong>块级元素</strong>;<br>    4.设置父级元素的overflow属性;<br>    5.设置父级元素的display：inline-block;<br><strong>差异</strong>:<br>    第一种方法会出现浮动元素先渲染后没有被clear作用到;<br>    第四种方法设置overflow属性后会引发其他的副作用;</p>
<h3 id="3-css样式有哪几种方式作用到html"><a href="#3-css样式有哪几种方式作用到html" class="headerlink" title="3. css样式有哪几种方式作用到html"></a>3. css样式有哪几种方式作用到html</h3><pre><code>1.内联样式 html style属性 
2.内部样式 style标签 
3.外部样式 &lt;link style=&quot;text/css&quot; rel=&quot;styleSheet&quot;/&gt;
4.浏览器缺省设置
层叠样式表 优先权降序排列</code></pre><h3 id="4-css常用的display属性"><a href="#4-css常用的display属性" class="headerlink" title="4. css常用的display属性"></a>4. css常用的display属性</h3><pre><code>1. none:元素不会被显示; 
2. block:元素为块级元素,元素前后会带有换行符;
3. inline:内联元素,元素前后不会带有换行符;
4. inline-block 行内块元素;
5. flex:弹性布局(弹性布局后，子元素的float,clear,vertical-align都会失效); 
6. inline-flex:行内flex布局;</code></pre><h3 id="5"><a href="#5" class="headerlink" title="5."></a>5.</h3>
      
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              <div class="post-toc-content"><ol class="nav"><li class="nav-item nav-level-3"><a class="nav-link" href="#1-css-reset的作用和用途"><span class="nav-number">1.</span> <span class="nav-text">1. css reset的作用和用途</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#2-css为什么要清除浮动，如何清除浮动及几种方法之间的差异"><span class="nav-number">2.</span> <span class="nav-text">2. css为什么要清除浮动，如何清除浮动及几种方法之间的差异</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#3-css样式有哪几种方式作用到html"><span class="nav-number">3.</span> <span class="nav-text">3. css样式有哪几种方式作用到html</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#4-css常用的display属性"><span class="nav-number">4.</span> <span class="nav-text">4. css常用的display属性</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#5"><span class="nav-number">5.</span> <span class="nav-text">5.</span></a></li></ol></div>
            

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